The European Commission can theoretically go as far as 10% of a firm's global sales. To put that into perspective, $1.33 billion is equivalent to about 3.46% of Intel's revenue of $37.6 billion in 2008. Regulators would presumably impose a fine that high only in the event of cartel behavior, however, not to an individual company.
The Commission has been investigating Intel ever since receiving a complaint from AMD in 2000. The charges include offering inducements to European retailers for not buying processors from AMD, paying “a leading OEM” to delay the launch of products with an AMD inside, and giving substantial rebates to the same OEM if it bought only CPUs from Intel. The latter of course maintains that its actions were within legal boundaries.